Heating attachment for wax-thread sewing-machines



(No Model.)

B. F. LANDIS.

HEATIKG ATTACHMENT FUR WAX THREAD SEWING MACHINES No. 305,932.- 4 Patented ept. 30, 1884.;

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Miran STATES BENJAMIN F. LANDIS, OF ST. JOSEPH, MISSOURI.

HEATING ATTACHMENT FOR WAXJHREAD SEWlNG-MACHlNES.

SPECIFICATION forming part of Letters Patent No. 305,932, dated September 30, 1884.

Application filed June 14, 1883. (No model.)

To @313 whom it may concern:

Be it known that l, BENJAMIN F. Illinois, of St. Joseph, in the county of Buchanan and State of Missouri, have invented a new and useful Improvement in Heating Attachments for \Vaxed lhread Sewing-Machines, of which the following is a full, clear, and exact description.

This invention relates to that classof sewing-machines which apply wax to the thread while sewing. In order that waxed threads may be used in sewing, it is necessary that they be kept pliable by the application of heat. For this purpose some machines have used steam injected into the shuttle-race. This has a damaging effect on the work. It also prevents the wax from adhering to the thread,

andcauses the thread to become so limp that 7 it will not loop well. In cold weather it con- (lenses in the shuttle-race in drops of water, and in all weather it quickly rusts the machine. If, on the other hand, too much heat is applied, the thread will be damaged and the wax will boil overl v v The object of my invention is to establish a mean between these two extremes,and to avoid the objectionable features of both.

To this end my invention consists in aheating attachment for sewing-machines, constructed as hereinafter described and claimed, reference being had to the accompanying drawings, in which Figure 1 is a longitudinal vertical section of my heater, showing the adjacent parts of a sewing-machine to which it is attached- Fig. 2 is a plan View of the same with the top plate removed. Fig. 3 is a transverse vertical section at 3/ 3 Fig. 1; and Fig. 4 is a transverse vertical section of shuttlerace and wax-bowl at a: w.

A represents the body or frame of the sow 'ing-machine, to which the box B is attached in any usual manner. This box is made of sheet metal, preferably copper, as agood heat ing medium. It consists of an outer wall, 0

0, provided with a horizontal floor, D, below which is the combustion-chamber a, in which one or more flames, b, are produced by means of lamps, gas-jets, &c. This chamber is open for free ingress of air at the bottom.

E is another floor or horizontal partition separating the water-boiler a from the hotair chamber a and the wax-reservoir n.- The :watenboiler is filled through a tube entering the top, and another tube may furnish an escape for steam, neither of which tubes is shown. F represents a flue communicating from the combustion-ch21 mbernto the hot-air chamber n 0 is a pipe for delivering hot air from chamber a to the shuttle-race k. I have shown this pipe as extending around to enter the shuttle race from its outer end 5 but the connection may be made at any point along the shuttlerace desired.

or. represents the wax-bowl, into which the point of the needle dips ateach stitch, carrying the thread in its eye into the wax, which is kept melted in said bowl by heat received through a pipe, (0 directly from the air-chamber of or indirectly from pipe 0. The wax in chamber if is kept sufiiciently hot by the wa-.

ter boiler beneath it to remain fluid, and it may be delivered to the Wax-bowl a by any usual method, such as the pump K, which is actuated to deliver through pipe a*' a little wax at each stroke of the needle.

n is an overflowpassage leading from the upper portion of bowl of to the-wax-ehamber a, to return the surplus wax, as it is intended that the bowl shall always be fully supplied.

The operation is as follows: The air, becoming heated in the chamber it, rises through flue F into chamber 02 whence it passes through pipes c and c to the shuttle-race and to the wax-bowl. By interposing the water-chamber between the flame and the body of the air-' shuttle-race I prevent any ilame or any air dangerously hotfrom entering the shuttle-race. At the same time I insure a supply. of perfectly dry air at a degree of heat sufficient to accomplish the desired result.

WVhat I claim as my invention, and Wish to secure by Letters Patent, is

l. The combination, with the stitch-forming devices of a sewing-machine, a combustionchamber, and an air-passage leading therefrom to the sewing-machine shuttle-race, of a water-chamber interposed between-the combustion-chamber and the sh uttle-ra-ce, substantially as and for the purpose specified.

2. The combination, with the stitch-forming devices of a sewing-machine, a combustion-chamber, an air-passage leading therefrom to the sewing-machine shuttle-race, and awater-chamber interposed between the combustion-chamber and shuttle-race, of a hot air chamber communicating with the said airpassage between the Water-chamber and shuttle-race, substantially asand for the purpose specified.

3. The combination, with the stitch-forming devices of a sewing-machine and an open-bottomed combustioirchamber, of a water-chamber covering the top thereof, a hot-air chamber above the water-chamber, a flue connecting the combustion chamber with the airchamber, and an air-passage arranged to connect said air-chamber with the shuttlerace of r BENJ. F. LANDIS.

\Vitnesses Sr As R. OWEN, F. WV. BRADLEY. 

